Malicious PDF — malware analysis report

Static analysis result for SHA-256 02751937d41e4ed1…

MALICIOUS

PDF

76.0 KB Created: 2021-01-24 21:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 21efcd66d644952a0e1336820aeeb3e7 SHA-1: d283a469ad2fa6231ecbc000805604d791c6fdb4 SHA-256: 02751937d41e4ed113cec035cf8f5eb238b36d6ef9216ecdd1483a497b788ed3
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF document flagged by multiple heuristics as malicious, including credential phishing and a link farm. It impersonates PayPal, directing users to a redirector URL which likely leads to a credential harvesting page. The presence of numerous external links, some pointing to benign content and others to unknown or potentially malicious domains, suggests a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/b3684278.pdf.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/123?utm_term=gace+program+admission+study+guide+free PDF link annotation
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/b3684278.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/gapexuxapusaba_retutawekas_gejuzaxu.pdfIn PDF document text
    • http://dorightpress.com/green_pumpkin_recipes_vegant4gju.pdfIn PDF document text
    • http://pornbustyvids.com/dogotolibelulubix01c9h.pdfIn PDF document text
    • http://copyrighthelpptteam.com/20443643134alkrt.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/mulevepuriwu.pdfIn PDF document text
    • http://bandalet.club/goal._com_arsenal_news_all_sourceskzp66.pdfIn PDF document text
    • http://sarkife.site/anti_virus_android_gameyhql4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/zebegezan.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/miripiwebug.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/bleaching_egyptian_cotton_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/esc_guidelines_endocarditis_2009.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/atheros_ar5005g_windows_xp_driver.pdfIn PDF document text
    • http://jonegukum.epizy.com/google_translate_web_page_android.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/gabus.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 5456 bytes
SHA-256: 9c2695d22cd373ce15ec86768576b695282e7e95ea5f7534624c1f0fb301f8e5
font_01_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 11076 bytes
SHA-256: 6b412575f14e116f9f245af780eca19c04252b437b73f85ee108c734d5e87772
font_02_sfnt_off0001148c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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